Chain-driven Overhead Cam Engine is Long on Features but Short on History
A close look at the overhead camshaft, ignition timer and rocker arm, which are carried in a common bracket. The bracket can be adjusted fore and aft to take up slack in the cam chain. The device on top of the cylinder and to the rear is the vacuum pump.
David Williams’ Little Giant after restoration and as found. Note the 2-foot carpenter’s square, which gives some scale to the engine.
Except for the camshaft, all the ancillary parts on the front of David’s engine are made from brass.
The disassembled engine shows the 10-inch-long, 3-1/4-inch-diameter piston incorporating a 5-inch center for the vacuum pump. Note the stepped base casting.